Consider Derek's budget information: materials to be used totals $65,100; direct labor totals $201,700; factory overhead totals $393,100; work in process inventory January 1 is $185,600; and work in progress inventory on December 31 is $196,000. The budgeted cost of goods manufactured for the year is Oa. $845,500 Ob. $659,900 Oc. $649,500 Od. $196,000